Watercress (Nasturtium officinale) can be found all over the world, it is cultivated in many regions. The perennial plant has small white flowers , a tangy smell, and radish-like taste. The applicable parts of watercress are the above ground parts, collected during the flowering season. Watercress is a member of the Brassicaceae/Cruciferae family. The above ground parts contain mustard oil, vitamin C, beta-carotene, and vitamin K. A main constituent of watercress is phenehtyl isothiocyanate. Watercress has demonstrated antibiotic and diuretic effects. It has been used for broncitis, cough, respiratory tract mucous membrane inflammation, appetite stimlulation, improved digestion, as a laxative and restorative.
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Cautions Orally, large amounts of watercress can cause gastrointestinal irritation. Take only the recommended dosage.